Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788d9adaf09a16e…

MALICIOUS

PDF

97.5 KB Created: 2021-10-12 04:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 0512643d364b372eff4a626de0c0e6d2 SHA-1: 9c67fe3aee5d982deaa16ad221469b8125c4ce9a SHA-256: 4788d9adaf09a16e83dca388c1518126e1ef03bc28e7b009ecf48da6cb90dfaf
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=all+about+moscow PDF link annotation
    • http://brukikostka.pl/uploads/page/file/tomoka.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4b75f256b03eb016c64b64d9ccdd8f2e/60528281785.pdfIn PDF document text
    • http://thaiurethane.com/userfiles/file/valopobefir.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/vimofogorog.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/xumuwudexesuro.pdfIn PDF document text
    • http://rvhifi.cz/files/file/68545424823.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/82030300597.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/48665655032.pdfIn PDF document text
    • https://www.confirmedtour.com/files/zenepexatubevude.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/84757802379.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/pofobe.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/85260313832.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f5b069b9d---fikebutelimixuterofitaji.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/duwuxizise.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210917115408.pdfIn PDF document text
    • https://simorgh.it/uploads/file/vojawizipuz.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/50e8c4ce30556f65a963d8c08fb29d0b/pivebazolasumobu.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/65350509572.pdfIn PDF document text
    • http://rayanchem.com/d/files/kakomedejenadirevizilezuv.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/ridoralobum.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/ebc821837b59208be3fda9e7c6fff4f9/1739201715.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/gubuvunomikesefegimal.pdfIn PDF document text
    • http://kraciowka.pl/userfiles/file/32078077631.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 23636 bytes
SHA-256: 62712e0e3fe8769c6bf78c1c1df6f588e99a9484201d29825dc7afc8b3b628ff
font_02_sfnt_off000161b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B2 10268 bytes
SHA-256: a2e21ffaad10b5573455c2f7f770b0df894196a2eb3bb64438a2de5d42296d17